Study 1
School Behavior
Teachers of CPP students reported improved scores for aggressive behavior in school, compared with teachers of control group students. This difference was statistically significant.
Delinquency
Lochman and Wells (2003) found that students who participated in the Coping Power Program (CPP) self-reported less delinquency, compared with students in the control group, at the 1-year follow up. This difference was statistically significant.
Substance Use
CPP students self-reported less substance use, compared with control group students, at the 1-year follow up. This difference was statistically significant.
Study 2
School Behavior
Teachers of CPP students reported improved scores for aggressive behavior in school, compared with teacher-reported scores of control group students. This difference was statistically significant.
Covert Delinquency
CPP students were less likely to engage in covert delinquency (e.g., minor theft, felony theft, fraud, destruction of property), compared with the control group students, at the 1-year follow up. This difference was statistically significant.
Overt Delinquency
Lochman and Wells (2004) found no statistically significant differences between students who participated in CPP and control group students on measures of overt delinquency (e.g., minor assault, felony assault, robbery) at the 1-year follow up.
Substance Use (Parent Report)
CPP students received lower parent-reported scores on substance use, compared with the parent-reported scores of control group students, at the-year follow up.
Substance Use (Child Report)
There were no statistically significant differences between the groups in self-reported substance use at the 1-year follow up.
Study 3
Delinquency
Zonnevylle–Bender and colleagues (2007) found no statistically significant differences between the CPP students and control group students in self-reported delinquency at the 5-year follow up.
Alcohol Use (Use in Last Month)
There were no statistically significant differences between the groups in alcohol use within the last month at the 5-year follow up.
Alcohol Use (Lifetime Use)
There were no statistically significant differences between the groups in lifetime alcohol use at the 5-year follow up.
Marijuana Use (Lifetime Use)
CPP students self-reported lower lifetime use of marijuana, compared with the control group, at the 5-year follow up. This difference was statistically significant.
Marijuana Use (Use in Last Month)
There were no statistically significant differences between the groups in marijuana use within the last month at the 5-year follow up.
Cigarette Use (Use in Last Month)
CPP students self-reported lower use of cigarettes in the last month, compared with the control group, at the 5-year follow up. This difference was statistically significant.
Cigarette Use (Lifetime Use)
There were no statistically significant differences between the groups in lifetime use of cigarettes at the 5-year follow up.